Shell encased pool chemical tablet



FIG. 1 is a top perspective view of a shell encased pool chemical tablet showing my new design;

FIG. 2 is a side elevational view thereof, the other side being identical;

FIG. 3 is an end elevational view thereof, the other end being identical; and,

FIG. 4 is a top plan view thereof. 

The ornamental design for a shell encased pool chemical tablet, as shown and described. 